Chia-Ping Tsai commented on HBASE-18528:

[~anoop.hbase] Could you take a look? Thanks

> DON'T allow user to modify the passed table/column descriptor
> -------------------------------------------------------------
>                 Key: HBASE-18528
>                 URL: https://issues.apache.org/jira/browse/HBASE-18528
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Coprocessors, master
>            Reporter: Chia-Ping Tsai
>            Assignee: Chia-Ping Tsai
>            Priority: Critical
>             Fix For: 2.0.0
>         Attachments: HBASE-18528.v0.patch, HBASE-18528.v1.patch, 
> HBASE-18528.v2.patch
> We are replacing the HTableDescriptor by TableDescriptor from code base. The 
> TableDescriptor is designed to be a read-only object so user can't modifiy it 
> through MasterObserver. HBASE-18502 change many methods of MasterObserver to 
> use TableDescriptor but some deprecated methods still accept the 
> HTableDescriptor. User may be confused by why some methods can't modify the 
> table descriptor.
> In short, Should we allow user to modify the passed table descriptor?
> # if yes, we should introduce a mechanism that user can return a modified 
> table descripror
> # if no, we should pass ImmutableHTableDescriptor to user. Or we just remove 
> all methods accepting the HTableDescriptor
> Ditto for HColumnDescriptor.

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